DatetimeIndex.
floor
Perform floor operation on the data to the specified freq.
The frequency level to floor the index to. Must be a fixed frequency like ‘S’ (second) not ‘ME’ (month end).
Examples
>>> rng = ps.date_range('1/1/2018 11:59:00', periods=3, freq='min') >>> rng.floor("H") DatetimeIndex(['2018-01-01 11:00:00', '2018-01-01 12:00:00', '2018-01-01 12:00:00'], dtype='datetime64[ns]', freq=None)